Seasonal in Biological News

AGU journal highlights -- Aug. 6, 2009

... around Antarctica A 3-D model of ocean dynamics seasonal winds might drive current variability in the ... 12. seasonal winds might drive current variability in the ... of India. They find that while sea level shows a seasonal variability, the alongshore current shows no ...

Early initiation of Arctic sea-ice formation

... and winter and melted in spring and summer, as seasonal sea ice does today," they say. Synedropsis ... to dominate summer production. And, indeed, these seasonal changes can be discerned in the sediment cores. ... half a million years later by the onset of seasonal sea-ice formation in offshore areas of the ...

The last supper of the hominids establishes the times they lived at the sites

... long-term occupation and a succession of shorter seasonal occupations in the same place", he explained to ... tarandus ). "This method allows us to confirm the seasonal nature of the occupation", Rivals added. ... team, the microwear of the teeth is sensitive to seasonal changes in the diet. The application has ...

Jeepers creepers: Climate change threatens endangered honeycreepers

... Hawaii depends on climatic conditions, especially seasonal changes in temperature and rainfall that increase ... dispersing juvenile birds and adults that follow seasonal flowering of native plants to lower elevations ... USGS scientist Dr. Dennis LaPointe, "this seasonal movement happens at the same time that mosquito ...

Taking the pulse of our planet

... outdoors and help track the effects of climate on seasonal changes in plant and animal behavior. The ... observations of flowering, fruiting and other seasonal events. Scientists and resource managers will ... animal life." Phenology is the study of the seasonal cycles of plant and animals, such as plants ...

Scientists identify human monoclonal antibodies effective against bird and seasonal flu viruses

... previous pandemic influenza viruses, and some seasonal influenza viruses. These antibodies have the ... to prevent or treat certain types of avian and seasonal flu. The study was published online on February ... number of different types of bird flu and seasonal influenza viruses were inhibited and the mAb ...

Scientists identify human monoclonal antibodies effective against bird, seasonal flu viruses

... previous pandemic influenza viruses, and some seasonal influenza viruses. These antibodies have the ... to prevent or treat certain types of avian and seasonal flu. The study will be published online on ... number of different types of bird flu and seasonal influenza viruses were inhibited and the mAb ...

Models simulate nitrate dynamics in Garonne, Southwest France

... were in accordance with expected flow and seasonal N patterns. In the low and mid reaches of the Garonne, the NO3-N concentrations exhibited a clear seasonal pattern with a peak concentration coinciding with ... models can be used successfully to simulate the seasonal and decadal flow and water quality dynamics from ...

Winter brings flu, summer brings bacterial infections

... as 17 percent with every 10 degree increase in seasonal temperature. The findings, which were based on ... The cause is not known, scientists said, but the seasonal variation is clear. "Gram-negative bacteria ... in the heat of summer." Recognition of these seasonal trends, the researchers said, may improve disease ...

Masks, hand washing, prevent spread of flu-like symptoms by up to 50 percent

... Aiello said. The findings, "Mask Use Reduces seasonal Influenza-like Illness In The Community Setting," ... a few of these measures can be evaluated during seasonal influenza outbreaks, many are difficult or ... interventions can be evaluated now, during seasonal influenza outbreaks, which can provide concrete ...

AGU journal highlights -- Oct. 16, 2008

... Through studies of the grasshopper effect's seasonal variability and long-range atmospheric transport ... taken by a chemical over the oceans is driven by seasonal biogeochemical processes occurring in the water ... related to regional wind forcing, which can drive seasonal on-shelf flow that varies in strength from year ...

Alcohol is associated with risk of perennial allergic rhinitis

... authors did not observe any increase in risk of seasonal allergic rhinitis according to alcohol intake. ... women studied were aged 20-29 years and free of seasonal and perennial allergic rhinitis at the start of ... were contacted again and 831 women had developed seasonal AR and 523 had women developed perennial AR, 14% ...

Arctic climate under greenhouse conditions in the Late Cretaceous

... layers composed of two distinctly different diatom assemblages, reflecting seasonal changes. Their analysis clearly demonstrates that seasonal blooming of diatoms was not related to the upwelling of nutrients, as has ...

Australia's climate: Drought and flooding in annual rings of tropical trees

... temperature and precipitation. In the tropics, however, with only slight seasonal variations, the correlation is not so evident. Now scientists of the GFZ ... ring chronology in tropical Australia", says Ingo Heinrich. To date the seasonal climate forecast for Australia has been based on calculations of the ...

CU-Boulder study shows 53 million-year-old high Arctic mammals wintered in darkness

... An analysis of oxygen isotopes from the fossil teeth helped determine seasonal changes in surface drinking water tied to precipitation and temperature, ... evidence for babies and juveniles in the Arctic preclude the idea of long, seasonal migrations to escape the winter darkness, she said. "In order for ...

Study: Excessive use of antiviral drugs could aid deadly flu

... microorganisms." Resistance to adamantanes among strains of seasonal influenza spiked in Asia in 2002, and by 2006 the agents were considered ... reports have suggested a spike of resistance to oseltamivir in strains of seasonal influenza have occurred in Northern Europe and Canada. In analyzing the ...

Oil spray reduces greenhouse gas emissions from pig finishing barns

... carbon dioxide concentrations and emission rates were affected by diel and seasonal fluctuations of ambient temperature. Methane was produced from decomposing ... field investigation was conducted from August 2002 to July 2003 to cover seasonal variations. Quantification and mitigation of air pollution from animal ...

AGU journal highlights: Nov. 11, 2008

... 2008; http://dx.doi.org/10.1029/2008GL035333 10. A seasonal look at soil moisture Modifications of temperatures and precipitation ... collected from October 2006 through September 2007, the authors find large seasonal differences in root-zone moisture dynamics as well as large differences in ...

Sedimentary records link Himalayan erosion rates and monsoon intensity through time

... in Asia have been linked to variations in the precipitation resulting from seasonal monsoons. A new paper published online today in the journal Nature ... the world's highest. The climate over much of Asia is dominated by seasonal winds that carry moist air over the Pacific Ocean into East Asia and over ...

Wildflower declines in Thoreau's Concord woods are due to climate changes

... Rapid changes in temperature which have led to changes in the timing of seasonal activities, such as flowering, make some closely related groups of species ... is greatest when assessed against species' ability to track short-term seasonal temperature versus long-term flowering shifts. Thus, the association ...

AGU journal highlights -- Sept. 3, 2008

... classify provinces. It is also unknown how province boundaries respond to seasonal and climate forcings. The currently used static provinces make it ... define ocean provinces in both space and time. They find that seasonal patterns in province boundaries reflect well-known oceanic processes, as ...

Southern Sierra Science Symposium planned for Visalia

... climatology; climate-wildfire interactions; statistical modeling for seasonal forecasts, paleofire reconstructions, and climate change impact ... where he began his study of forestry at Purdue University. Summer seasonal work as a smokejumper for the Forest Service and the Bureau of Land ...

Aphids are sentinels of climate change

... the year and in significantly higher numbers. We have been studying the seasonal biology of aphids for a long time now and we know that populations can ... of the big challenges facing the world today. These long-term data on the seasonal appearance of flying aphids not only show that there are already ...

Vine invasion? UWM ecologist looks at coexistence of trees and lianas

... be a factor." His hypothesis is that tropical lianas thrive during seasonal droughts, when trees suspend their growth and lose their leaves, giving ... respond to drought. "If lianas can grow far more than trees during seasonal droughts, then global increases in drought from such events as El Nio or ...

Study: Migrant laborers valuable to horticulture industry

... the presence of migrant workers appears to raise wage levels for both seasonal part-time and full-time workers. The total number of hours worked by seasonal part-time and full-time employees is also positively related to wage ....

Ozone hole recovery may reshape southern hemisphere climate change

... years, in response to the rapid onset of the ozone hole," he said. "These seasonal changes will decay more slowly than they built up, since it takes longer ... of ozone-depleting gases than it took for them to build up." The seasonal shift in large-scale circulation patterns could have repercussions for ...

February Geology and GSA Today media highlights

... include: tree ring-based reconstruction of an extinct polar forest's seasonal environment; geological vs. seismological views of paleo-earthquakes; ... 45-million-year-old) tree rings allowed the reconstruction of the seasonal environment of an extinct polar forest. Deciduous conifer trees ...

MIT finds key to avian flu in humans

... of potentially improved therapeutic interventions for both avian and seasonal flu, said Ram Sasisekharan, MIT Underwood Prescott Professor of Biological ... findings will help in the development of more effective strategies for seasonal flu, which still is a leading cause of death. "Subtle changes in ...

Research forecasts increased chances for stormy weather

... winds higher in the atmosphere." In addition, the study showed a strong seasonal and regional variation in the effects of climate change. "Some areas ... today, with an extension of the season in some areas. This increases the seasonal extremes, as opposed to more storms spread throughout the year. It is ...

AGU journal highlights -- Sept. 6, 2007

... AD 1400 Variations in the Asian monsoon, one of the Earth's largest seasonal weather patterns, can bring drought or torrential rain to southern Asia. ... altimeter data. Finally, using Argo data in the initialization of seasonal forecasts significantly improves the skill of forecasts of sea-surface ...

Savanna habitat drives birds, and perhaps others, to cooperative breeding

... of the cooperative breeders among these birds live in savannas - highly seasonal habitats with great variation in rainfall, and thus food, from one year to ... the researchers showed that African savannas are not only highly seasonal environments, but that rainfall is unpredictable and varies greatly from ...

University of Hawaii at Manoa researchers reveal ocean acidification at Station ALOHA

... grew more acidic at exactly the rate expected from chemical equilibration with the atmosphere. However, that rate of change varied considerably on seasonal and inter-annual timescales, and even reversed for one period of nearly five years. The year-to-year changes appear to be driven by climate-induced ...

K-State researcher, collaborators study virulence of pandemic H1N1 virus

... and his collaborators found that the California isolate was more virulent than the Mexico isolate. Both pandemic H1N1 viruses are more virulent than seasonal H1N1 flu viruses. "With different isolates, there are different clinical outcomes," he said. Establishing animal models for pandemic H1N1 is ...

Key OSU water research receives national funding

... canopy interception. Another important aspect will be to determine more exactly how redcedar encroachment increases root depth and alters seasonal water-use patterns. "For example, it is known that redcedar trees use water year-round," Zou said. "However, the degree of difference in water use ...

Iron and biological production in the high-latitude North Atlantic

... of Southampton's School of Ocean and Earth Science based at the National Oceanography Centre, said: "In effect, the high-latitude North Atlantic is a seasonal HNLC region, whereas classic, HNLC regions such as the Southern Ocean remain in this condition throughout the year." The failure of the ...

NSF provides $3.4 million to study climatically important Agulhas Current

... regularly sheds large Agulhas Rings, which carry Indian Ocean waters into the South Atlantic. "We anticipate this study will shed light on the seasonal to decadal variability of the Agulhas," said Beal. "Locally, the warm waters of the Agulhas effect African rainfall rates, and globally, there is ...

Troubled waters: Low Apalachicola River flow may hurt gulf fisheries

... and offshore fisheries." Morey, Dmitry Dukhovskoy, also of COAPS, and Mark Bourassa, an associate professor of meteorology at FSU, examined the seasonal and year-to-year variability of the river flow caused by changes in precipitation over the watershed encompassing much of western Georgia and parts ...

NOAA forecast predicts large 'dead zone' for Gulf of Mexico this summer

... of Louisiana and Texas in the Gulf of Mexico this summer could be one of the largest on record. The dead zone is an area in the Gulf of Mexico where seasonal oxygen levels drop too low to support most life in bottom and near-bottom waters. Scientists are predicting the area could measure between 7,450 ...

Study highlights massive imbalances in global fertilizer use

... where the large influx of nutrients has triggered huge algal blooms. The decaying algae use up vast quantities of dissolved oxygen, producing a seasonal low-oxygen dead zone in the Gulf that in some years is bigger than the state of Connecticut. Since 1995, the imbalance of ...

When palm trees gave way to spruce trees

... in northern latitudes, it was inevitable according to Dr. Greenwood. "Changes in the earth's position in its orbit were leading a much greater seasonal range in radiation for polar regions and, overall, heat was becoming more concentrated in the tropics, largely due to a global drop in carbon dioxide ...